<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		<style>
			.tdiv{
				width: 500px;
				height: 300px;
				border-style: solid;
				border-color: darkgrey;
				border-radius: 10px;
			}
			.tdiv input{
				width: 400px;
				height: 30px;
				border-color: #d8d4d496;
				border-radius: 5px;
				margin-left: 50px;
				margin-top: 20px;
			}
		</style>
	</head>
	<body>
		<div class="tdiv">
			<h2 style="text-align: center;">教学管理系统</h2>
			<input type="text" placeholder="请输入用户名" />
			<br />
			<input type="password" placeholder="请输入密码" />
			<input style="background-color: blue; color: white;" type="submit" value="登录" />
			
		</div>
	</body>
</html>
